MathThe registration code for a new softwear game you purchased consists of a string of 3 letters followed by 5 digits. How many different registration codes are possible? If you lost your registration code and had to quess, what is the probability that you will answer the correct...
September 20, 2007

mathHow many n-digit decimal sequences (using digits 0-9) are there with k 1s? Decimal sequences meaning you can have as many 0s in front of a number. For example: 000001234557891111 would be consider valid. So how do i come up with an equation? See my response to Sana's ...
October 15, 2006